3. What is the purpose of the oil on the oil immersion lens? Oil provides a medium for the bacteria to float on the slide
O oil prevents light distortion and makes the images clearer
Oil is a lubricant and allows the objectives to slide easily
O oil prevents any water from seeping into the cover slip

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Read the scenario below and answer the question that follows. hallie is reading a novel in the library when susan, her best friend, slumps down in a chair next to her. susan doesn't say anything, but hallie knows that susan is upset because she is slumping in her seat and rolling her eyes. a psychologist would explain that hallie is interpreting her friend's emotion based on a. the behavioral component of emotion b. her friend's ability to regulate emotion c. the verbal component of emotion d. the physiological component of emotion select the best answer from the choices provided a b c d

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above